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104 lines
3.4 KiB
Go
104 lines
3.4 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package iscsi
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import (
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"os"
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v1 "k8s.io/api/core/v1"
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"k8s.io/klog/v2"
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"k8s.io/utils/mount"
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"k8s.io/kubernetes/pkg/volume"
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"k8s.io/kubernetes/pkg/volume/util"
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)
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// Abstract interface to disk operations.
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type diskManager interface {
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MakeGlobalPDName(disk iscsiDisk) string
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MakeGlobalVDPDName(disk iscsiDisk) string
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// Attaches the disk to the kubelet's host machine.
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AttachDisk(b iscsiDiskMounter) (string, error)
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// Detaches the disk from the kubelet's host machine.
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DetachDisk(disk iscsiDiskUnmounter, mntPath string) error
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// Detaches the block disk from the kubelet's host machine.
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DetachBlockISCSIDisk(disk iscsiDiskUnmapper, mntPath string) error
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}
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// utility to mount a disk based filesystem
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// globalPDPath: global mount path like, /var/lib/kubelet/plugins/kubernetes.io/iscsi/{ifaceName}/{portal-some_iqn-lun-lun_id}
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// volPath: pod volume dir path like, /var/lib/kubelet/pods/{podUID}/volumes/kubernetes.io~iscsi/{volumeName}
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func diskSetUp(manager diskManager, b iscsiDiskMounter, volPath string, mounter mount.Interface, fsGroup *int64, fsGroupChangePolicy *v1.PodFSGroupChangePolicy) error {
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notMnt, err := mounter.IsLikelyNotMountPoint(volPath)
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if err != nil && !os.IsNotExist(err) {
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klog.Errorf("cannot validate mountpoint: %s", volPath)
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return err
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}
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if !notMnt {
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return nil
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}
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if err := os.MkdirAll(volPath, 0750); err != nil {
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klog.Errorf("failed to mkdir:%s", volPath)
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return err
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}
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// Perform a bind mount to the full path to allow duplicate mounts of the same disk.
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options := []string{"bind"}
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if b.readOnly {
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options = append(options, "ro")
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}
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if b.iscsiDisk.InitiatorName != "" {
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// new iface name is <target portal>:<volume name>
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b.iscsiDisk.Iface = b.iscsiDisk.Portals[0] + ":" + b.iscsiDisk.VolName
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}
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globalPDPath := manager.MakeGlobalPDName(*b.iscsiDisk)
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mountOptions := util.JoinMountOptions(b.mountOptions, options)
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err = mounter.Mount(globalPDPath, volPath, "", mountOptions)
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if err != nil {
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klog.Errorf("Failed to bind mount: source:%s, target:%s, err:%v", globalPDPath, volPath, err)
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noMnt, mntErr := b.mounter.IsLikelyNotMountPoint(volPath)
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if mntErr != nil {
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klog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr)
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return err
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}
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if !noMnt {
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if mntErr = b.mounter.Unmount(volPath); mntErr != nil {
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klog.Errorf("Failed to unmount: %v", mntErr)
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return err
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}
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noMnt, mntErr = b.mounter.IsLikelyNotMountPoint(volPath)
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if mntErr != nil {
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klog.Errorf("IsLikelyNotMountPoint check failed: %v", mntErr)
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return err
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}
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if !noMnt {
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// will most likely retry on next sync loop.
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klog.Errorf("%s is still mounted, despite call to unmount(). Will try again next sync loop.", volPath)
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return err
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}
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}
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os.Remove(volPath)
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return err
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}
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if !b.readOnly {
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volume.SetVolumeOwnership(&b, fsGroup, fsGroupChangePolicy)
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}
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return nil
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}
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